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Finding the Fourth Proportional to 100,911.92, 138,250.02 and 97,128.44

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Solution

The fourth proportional to 100,911.92, 138,250.02 and 97,128.44 is: 133,066.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,911.92 : 138,250.02 = 97,128.44 : x
  2. Step 2: Convert to fraction form
    100,911.92/138,250.02 = 97,128.44/x
  3. Step 3: Cross multiply
    100,911.92x = 138,250.02 × 97,128.44
  4. Step 4: Simplify right side
    100,911.92x = 13,428,008,772.57
  5. Step 5: Solve for x
    x = 13,428,008,772.57/100,911.92
  6. Step 6: Final answer
    x = 133,066.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.